Book construction



P 1943- I B. RUMMLERY 2,329,300

BOOK CONSTRUCTION Filed April 30, 1941 2 Sheets-Sheet 1 .22? 1/ 5.77 forP '14, 1943'. B. RUMMLER 2,329,300

BOOK CONSTRUCTION Filed April 30, 1941 2 Sheets-Sheet 2 ',&

"1 N n m w f r w b m k j in 1/ en for tion with the lifters.

Patented Sept. 14, 1943 BOOK, ooNs'mUorroN 1 Burke Rummler, Cayucos,ApplicationiApril so, 1941, Serial No. 391,023 5Claims.,o1..4o,-f-.104)} This invention relates to improvements. in

means for opening a book at predetermined divisions thereof, withanarrangement for receiving added leaves and allowing for easy removalof any leaf or page of the book. Moreparticularly,

the improvements relate to a keyboard construction attached to the baseor' back "coverof the book and to a specific'ring c'onstruction'forreceiving and guiding .the leaves of the "book in opening and closingmovements thereof- The objects of the invention are to provide a singleelement which serves the purpose of a multiplicity of keys with meansoperated thereby for partly opening the book at any one 'ofpredetermined sections thereof; to providean improved hingeconstruction. forthe cover and pages,,whereby anyone leaf, when'bentarcuately may be readily inserted or removed from' the book; andtopr'ovide, an improved and simplified means for partly openinga book atpredetermined sections thereof selectively.

'A- specific embodiment of. the improvements is illustrated in the.drawings, wherein:

Figure 1 is a planview of thebook; 2 is a cross'section ofthe book takenon the line 2-2 of Fig. 1.

Fig. 3 is a plan View of the book when open to,

the last pageto uncover the back thereof,

Fig. 4 is a fragmentary sectional view as on line 44 of Fig. 3 showingthe differentially spaced 7 means or on the cover, include a strip offlexible material secured to the back or base of the book.)

This element or flexible stripwill be referred to are'provided withalpairof' longitudinally spaced rectangular perforations Wherethe'leavespivot 'on split guidingi rings book.

.fixed'to the base of the .With reference tothe particularillustrationsin the accompanying drawings, thebase or back cover of the book'comprises a'rigid lower late 1 and upper'plate lispacdapart bylongitudinal cleats 3, 4 and 5. Securedat the right-hand'end of plate 2and above'the strip 5 is bearing memher 6 extending lengthwise ofi theback and upon" qhand edge offlthe bookbase so that. it may be secured tothe longitudinal edge :stripi. A I

The left-hand operating edge'of the keyboard strip 1, is divided by.notches 8 into a plurality of separate keys ;9.; Any one of these keysmay-be flexed downward byqmeansof the. rubber end of a pencil or thefinger ,ofa user. *Whenfso depressed afkey engages a correspondingleaflifting elementlEL; Theseleafliftersare all alike in form',and arepunchedjfrom sheet stock. Each is a lever with its fulcrum on auwire'rod ll. Curved eccentric portions I 2 1 the lifters extend below thekeys 9. I

When a key is depressed the corresponding lifter. is cammed thereby torock upwardly to the right, itsmaximum movement being less than 90 andthe liftercannot passthe dead center '1 positionb ut falls when thelifted leaves, of the I book are swung by ,hand to" full open position.Otherwise the lifter holds thebook in partlyopen I position due to theweightand. frictionyof the" as the keyboard, and is regularly notchedout to leave a plurality of tongue form of keys, which keys may bearindex characters designating divi-. 1,

sions of the book, or suchdesignations may be placed on the coveropposite the respective keys.

A series of opening pawl leversfor the bookare located in transverseslots in the base portion of a the book below the keys. These openingpawls which forms sponding divisional leaf and partly opens the book atthat point At their opposite or inner edges all leaves of thebookincluding the cover,

Hence, when anyone lifter is rocked on its pivot it engagesonly thecorre-.

leaves resting thereon, as'indicated in Fig. 2. I

The normal intended mannerof operating the" partly open leaves and tossthem to fully open position; Index characters are pressed into the keysas indicated at I3,Fig.- 3, and if lengthier titles arerequired; theseare carried by the cover opposite the keys, as indicated by the spacesoutlined at M, Fig.1.

The longitudinal frame member 5: aseries .of saw cuts [5 for receivingthe lifters I2, and,

has a longitudinal groove It at its upper edge into which wire H isdropped between the end. book back frame elements vI! and I8; which areattachedto the longitudinals 3, land 5. p Y v The "upper plate 2. of thebook back is also:

' thereof will extend over corresponding lifters so that each lifter mayopen the book at;a definite point. v j 1 Each, leaf of the booknear itsinner edge has a pair of rectangular perforations through c which passrings 25 of flat stock. The lower part of the rings are flattened andcountersunk into the longitudinal frame element 3 as indicated-at i 26,Fig. 2. Attached to the frame member .3 and passing over the rings tofirmly anchor, them to: I

frame member 3 are securing-strips 2:1.

Each ring 25 has a diagonal opening 28,at the top and these diagonalopenings are opposed in the pair ofcrings .to lenablesinsertion'orzremoval' of a book page whenaqpage-is bent toarouate fform-bypressing the upper and lower edges of the leaves toward eachother. This arcuate set of .a. leaf is'indicatedbythebro-keniline 29;.Fig; .3. .Thus, in the use'uof the construction leaves are insertedorremoved; in thatjmanner.

:In the operationof the keyboard'the book is opened'at aplaceindicatedby a key, which-when depressed :rocks oneof the" lifters andby-a .'con- .tinued inward motion of the thumb :used in de pressin a keythe book maybe :fiilly opened." The operated lifter drops back into'alignment with .the other lifters by gravity. :If a key is merelydepressed without "further bookj-opening-movement on the .partl of theuser of the book,=the

book'is leftfin partly open condition-at the point designated by theoperated key.-

"Iclaim: I a

1. 'A book comprising aback construction having attached thereto alongan edge' of the back apa'ir of spaced rings setting transversely of "andperpendicular to the back; the upper portions of said rings beingprovided with diag on'alopenings 'each at an angle to the other to alignw ith an :arcuately bent leaf, leaves hinged to the book by said pair ofrings, said leaves having perforaftions for riding along therings,-son1e of said leaves having projections at their free ends whichprojections are of different lengths to provide a stepped relation ofthe projections, a series of lifting pawls pivoted to the back cover ofthe book for engaging the different extensions on the leaves, and meansmounted on the back cover of the book and comprising a strip ofresilient material extending over the pawls and slotted etween thelifting pawls.

2. A book comprising'a-base structure having leaves pivotally connectedtherewith along one edge, said leaves having differently spaced projecting portions along adifl erent edge, a series of lifting lever pawlspivoted to the base each in position to engage a projection of adifferent leaf, and means for selectively operating any one of saidpawls comprising a strip of resilient sheet material mounted on the bookbase and operating tongue for each divided to provide an pawl.

material fastened to the ,book andhaving 5a plurality of projectingtongues, a series of leaf lifting ,pawls pivoted to the book and eachhaving a cam .portion extending tinder one 'of the tongues of theresilient strip.

4. Abookwith a keyboard construction extending along an edge thereof,said keyboard con- .struction comprising a :series of pivotedleaflifting pawls, and aipluralityo'f movable tongues each overlying "a,respective one of saidEpawls; each of said pawls :havinga cam portionextend ing under the respectivertongue,

.5. A book comprising a base structure having leaves-pivotally connectedtherewith along one edge, said leaves having difierentl-y'spacedprojecting portions along a difierent edge, a series ofpivotedliftinglever-pawls each positioned to engage a projection of:asdi'fiejrent leaf, and means for selectively operating any one of saidapawls,

each of said pawl-s l'lavingits "leaf-lifting fend formed to hold theleaves f-rictionally impartially lifted position upon operation of thepawlfto its maximum leaf lirting position.

BURKE npirmpnaj 3. ,A book with-a keyboard construction extend ing alongan edge thereof, said keyboard 'con- 'struction comprising a strip of:resilient sheet

